Fixed bug in test if block type is used by current edited pou

Fixed bug when adding and removing function block in graphic viewer. In some cases, the associated variable could stay in the variable panel.

Fixed coil and contact dialog to let user select a complex type variable for contact and coil expression

Fixed bug Drag'n drop variables from left panel to debug panel disabled

Fixed bugs with pou variable infos computation stylesheet

Fixed bug when pasting element with an odd width or height

Fixed refresh speed so that interface is not blocked when debugging

Added support for optimizing debug, preventing to filling buffers with only the last value for debug data consumers that only show the current state

Remove old debug panels and viewers not using matplotlib

Added new debug process separating non-wx thread extracting debug values from connector and 10 Hz wx timer refreshing Beremiz debug Viewers and communicating throw double-buffering, to avoid segmentation faults and optimize CPU usage

Cleaner matplotlib import preventing noisy warnings

Fixed bugs when editing resource variables and tasks

Fixed bug when debugging PLC with Graphic Viewer in debug open and re-transfer PLC

Fixed bug when loading complex type variable initial value